Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:24:41

Orbital Elements for A1902

WDS:	A1902	WDS ID/Discoverer
P:	93.610	Orbital period (years)
a:	0.31	Semi-major axis (arcseconds)
i:	49.8	Inclination (degrees)
Ω:	118.1	Longitude of ascending node (degrees)
T:	2057.690	Epoch of periastron passage (year)
e:	0.805	Eccentricity
ω:	271.5	Longitude of periastron (degrees)
Start-Year:	1979.0	Year
End-Year:	2071.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A1902

Position:	005920.47-004028.3	Epoch-2000 right ascension and declination
WDS-ID:	00593-0040	WDS designation
Discoverer Code:	A1902	Discover designation and components
ADS number:	819	Aitken Double Star catalog
HD number:	5781	HD catalog number
Hipparcos number:	4619	Hipparcos catalog number
V1:	8.11	Magnitude of the primary
V2:	9.17	Magnitude of the secondary
Equinox:		Equinox
Date:	2019	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A1902

WDS 6th Orbit including measures of A1902

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)

Ephemeris of A1902

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.348    226.1
-------------------------
1979.0     0.269    168.5
1980.0     0.275    170.4
1981.0     0.282    172.2
1982.0     0.287    174.0
1983.0     0.293    175.7
1984.0     0.298    177.3
1985.0     0.303    178.9
1986.0     0.308    180.4
1987.0     0.312    181.8
1988.0     0.316    183.3
1989.0     0.320    184.7
1990.0     0.324    186.0
1991.0     0.328    187.4
1992.0     0.331    188.7
1993.0     0.334    189.9
1994.0     0.337    191.2
1995.0     0.340    192.4
1996.0     0.342    193.7
1997.0     0.345    194.9
1998.0     0.347    196.0
1999.0     0.349    197.2
2000.0     0.351    198.4
2001.0     0.352    199.5
2002.0     0.354    200.6
2003.0     0.355    201.8
2004.0     0.357    202.9
2005.0     0.358    204.0
2006.0     0.359    205.1
2007.0     0.360    206.2
2008.0     0.360    207.3
2009.0     0.361    208.4
2010.0     0.361    209.5
2011.0     0.361    210.5
2012.0     0.361    211.6
2013.0     0.361    212.7
2014.0     0.361    213.8
2015.0     0.361    214.9
2016.0     0.360    216.0
2017.0     0.360    217.1
2018.0     0.359    218.2
2019.0     0.358    219.3
2020.0     0.357    220.4
2021.0     0.355    221.5
2022.0     0.354    222.6
2023.0     0.352    223.8
2024.0     0.350    224.9
2025.0     0.348    226.1
2026.0     0.346    227.2
2027.0     0.344    228.4
2028.0     0.341    229.6
2029.0     0.339    230.9
2030.0     0.336    232.1
2031.0     0.332    233.4
2032.0     0.329    234.7
2033.0     0.326    236.0
2034.0     0.322    237.3
2035.0     0.318    238.7
2036.0     0.313    240.1
2037.0     0.309    241.6
2038.0     0.304    243.1
2039.0     0.298    244.7
2040.0     0.293    246.3
2041.0     0.287    248.0
2042.0     0.280    249.7
2043.0     0.273    251.6
2044.0     0.266    253.5
2045.0     0.258    255.6
2046.0     0.250    257.8
2047.0     0.241    260.1
2048.0     0.231    262.7
2049.0     0.220    265.5
2050.0     0.208    268.6
2051.0     0.195    272.1
2052.0     0.180    276.1
2053.0     0.163    280.9
2054.0     0.143    287.0
2055.0     0.119    295.3
2056.0     0.089    308.6
2057.0     0.053    338.6
2058.0     0.043     57.3
2059.0     0.077    101.7
2060.0     0.108    118.6
2061.0     0.133    128.4
2062.0     0.153    135.3
2063.0     0.171    140.7
2064.0     0.186    145.1
2065.0     0.199    149.0
2066.0     0.211    152.3
2067.0     0.222    155.4
2068.0     0.232    158.1
2069.0     0.241    160.6
2070.0     0.249    163.0

Disclaimer

Acknowledgements

The Double Star Calculator - Orbital Elements makes use of the Washington Double Star Sixth Catalog of Orbits of Visual Binary Stars, maintained at the U.S. Naval Observatory.